TDA5145

INTEGRATED CIRCUITS DATA SHEET TDA5145 Brushless DC motor drive circuit Product specification Supersedes data of March 1992 File under Integrated Circuits, IC11 June 1994 Philips Semiconductors Philips Semiconductors Product specification Brushless DC motor drive circuit FEATURES Full-wave commutation (using push/pull drivers at the output stages) without position sensors Built-in start-up circuitry Three push-pull outputs: – output current 2.0 A (typ.) – built-in current limiter – soft-switching outputs for low Electromagnetic Interference (EMI) Thermal protection Flyback diodes Tacho output without extra sensor Motor brake facility Direction control input Reset function Transconductance amplifier for an external control transistor. QUICK REFERENCE DATA Measured over full voltage and temperature range. SYMBOL VP VVMOT VDO ILIM Notes 1. An unstabilized supply can be used. 2. VVMOT = VP; +AMP IN = −AMP IN = 0 V; all outputs IO = 0 mA. ORDERING INFORMATION PACKAGE TYPE NUMBER PINS TDA5145 TDA5145T 28 28 PIN POSITION DIL SOL MATERIAL plastic plastic PARAMETER supply voltage input voltage to the output driver stages drop-out output voltage current limiting note 1 note 2 IO = 100 mA VVMOT = 10 V; RO = 1.2 Ω CONDITIONS 4 1.7 − 1.8 MIN. − − 0.90 2.0 TYP. GENERAL DESCRIPTION APPLICATIONS General purpose spindle driver e.g.: – Hard disk drive – Tape drive – Optical disk drive. TDA5145 The TDA5145 is a bipolar integrated circuit used to drive 3-phase brushle...